*: Fix some Python 3 incompatibilities

Change-Id: Id324c0c5741e21fcd649b3b95894406808ebd286
Reviewed-on: https://pigweed-review.googlesource.com/c/infra/recipes/+/55920
Reviewed-by: Oliver Newman <olivernewman@google.com>
Commit-Queue: Rob Mohr <mohrr@google.com>
8 files changed